AfriGeneas Military Research Forum

Not sure if these books have been mentioned but the African American Civil War and Civil Rights Museum in DC sells a series of books called the Book Of Names. Volumes I: The Northern States, Volume II: the Southern States, and Volume III: The Border States. These books contain a "state by state listing of African American Soldiers in the Civil War". I found it helpful because I could search for surnames in a specific state. I found a relative with Civil War service that I had no idea existed. These are the same names on the African American Civil War Memorial Wall.